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sdas [7]
3 years ago
9

Twenty percent of all trucks undergoing a certain inspection will fail the inspection. Assume that 40 trucks are independently u

ndergoing this inspection, one at a time. The expected number of trucks who fail the inspection is: A.8 B.16 C.20 D.40
Mathematics
1 answer:
BaLLatris [955]3 years ago
4 0

i was going to answer but siomeome beat me lol but hdjwStep-by-step explanation:

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Someone please help me answer this!1
Arada [10]

Answer:

16 km is the answer

Step-by-step explanation:

a (Colton to parents' house) = 12 km

b = ?

c (parents' house to grandparents' house) = 20 km

According to the Pythagoras theorem,

a² + b² = c²

12² + b² = 20²

144 + b² = 400

b² = 400 - 144

b² = 256

b = 16

∴ Colton is 16 km away from his grandparents' house.

6 0
3 years ago
Solve the system of linear equations using any method 6x+6y=-6, 5x+y=-13
Sergio [31]

Answer:

x=-3

y=2

Step-by-step explanation:

To solve this problem you can use the elimination method:

- Multiply the second equation by -6:

(-6)5x+y=-13\\-30x-6y=78

- Add both equations:

6x+6y=-6\\-30x-6y=78\\-------\\-24x=72\\x=-3

- Substitute the value of x into one of the original equations and solve for y:

6(-3)+6y=-6\\-18+6y=-6\\6y=12\\y=2

8 0
3 years ago
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A scientist observes a petri dish containing a number of bacteria. On the first day, the dish had 300 bacteria on the second day
dezoksy [38]
I Think the answer is  because the pattern is to multiply it by 4



19200 answer

8 0
3 years ago
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Find the measure of each angle of the triangle HIJ. There will be three answers. (Hint: find the value of x first.)
vekshin1
<h3><em>= 3x - 2 + 3x - 9 + 4x - 9 = 180 ( Angle sum property )</em></h3><h3><em>= 3x + 3x + 4x - 2 - 9 - 9 = 180 </em></h3><h3><em>= 10x - 20 = 180 </em></h3><h3><em>= 10x = 180 + 20 </em></h3><h3><em>= 10x = 200</em></h3><h3><em>= x = 200 / 10 </em></h3><h3><em>= x = 20</em></h3><h3><em>therefore the angle's are,</em></h3><h3><em>58, 51, 71.</em></h3><h3><em>HOPE IT HELPS !!!</em></h3>
6 0
2 years ago
suppose sin(A)=2/5. Use the trig identity sin^2(A)+cos^2(A)=1 to find cos(A) in quadrant 1. Round to ten-thousandth.
shutvik [7]

Answer:

about0.9165

Step-by-step explanation:

3 0
3 years ago
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